Second and third class levers both have
a. the fulcrum between the effort and load
b. effort applied in the same place
c. two loads and fulcrums
d. the fulcrum at one end of the lever

The answer would be:

D. the fulcrum at one end of the lever.

Both second class and third class levers have their fulcrum located at the end of the lever. They differ in the location of the load and effort. For third class levers the effort is in between the load and the fulcrum. For second class levers, the load is in between the effort and fulcrum. You can look at the attached picture as reference.

When invisible waves of radiant energy come into contact with a solid, the particles in the solid vibrate faster. The solid becomes hotter. The solid can in turn, reradiate some of this energy back into the area where it is standing.